Optimal HMM filtering and decision feedback equalisation for differential encoded transmission systems

Ford, Jason J. & Moore, John B. (1998) Optimal HMM filtering and decision feedback equalisation for differential encoded transmission systems. In Jain, L.C. & Jain, R.K. (Eds.) Proceedings of Second International Conference on Knowledge-Based Intelligent Electronic Systems, 1998, IEEE, Adelaide, Australia, pp. 156-164.

View at publisher


In this paper conditional hidden Markov model (HMM) filters and conditional Kalman filters (KF) are coupled together to improve demodulation of differential encoded signals in noisy fading channels. We present an indicator matrix representation for differential encoded signals and the optimal HMM filter for demodulation. The filter requires O(N3) calculations per time iteration, where N is the number of message symbols. Decision feedback equalisation is investigated via coupling the optimal HMM filter for estimating the message, conditioned on estimates of the channel parameters, and a KF for estimating the channel states, conditioned on soft information message estimates. The particular differential encoding scheme examined in this paper is differential phase shift keying. However, the techniques developed can be extended to other forms of differential modulation. The channel model we use allows for multiplicative channel distortions and additive white Gaussian noise. Simulation studies are also presented.

Impact and interest:

0 citations in Scopus
Search Google Scholar™

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

29 since deposited on 30 Oct 2014
5 in the past twelve months

Full-text downloads displays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

ID Code: 78160
Item Type: Conference Paper
Refereed: No
DOI: 10.1109/KES.1998.725840
ISBN: 0780343166
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Control Systems Robotics and Automation (090602)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 1998 IEEE
Deposited On: 30 Oct 2014 23:48
Last Modified: 30 Oct 2014 23:49

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page